Finding the Fourth Proportional to 15,072.14, 22,609.29 and 3,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   15,072.14 : 22,609.29 = 3,978.72 : x
2. Step 2: Convert to fraction form
   15,072.14/22,609.29 = 3,978.72/x
3. Step 3: Cross multiply
   15,072.14x = 22,609.29 × 3,978.72
4. Step 4: Simplify right side
   15,072.14x = 89,956,049.23
5. Step 5: Solve for x
   x = 89,956,049.23/15,072.14
6. Step 6: Final answer
   x = 5,968.37